[CHAPTER XXIV]—Multiple Switchboard—Busy Test—Influence of Traffic
[CHAPTER XXV]—Magneto-Multiple Switchboard—Multiple Boards: Series, Branch-Terminal, Modern Magneto, Common-Battery
[CHAPTER XXVI]—Western Electric No. 1 Relay Board—Western Electric No. 10 Board—Types of Multiple Boards—Apparatus
[CHAPTER XXVII]—Trunking—Western Electric and Kellogg Trunk Circuits
Automatic Systems By K. B. Miller and S. G. McMeen Page 135
[CHAPTER XXVIII]—Automatic vs. Manual—Operation
[CHAPTER XXIX]—Selecting Switch—Line Switch—Trunking Systems—Two- and Three-Wire Systems—Subscriber's Station Apparatus—First and Second Selector Operation—Connector—Release after Conversation—Multi-Office System—Automatic Sub-Offices—Rotary Connector—Party Lines—Two-Wire Automatic System
[CHAPTER XXX]—Lorimer System—Central-Office Apparatus—Operation
[CHAPTER XXXI]—Automanual System—Operation—Subscriber's Apparatus—Operator's Equipment—Switching Equipment—Distribution of Calls—Connection—Speed
Power Plants and Buildings By K. B. Miller and S. G. McMeen Page 227